Doorbell



FIG. 1 is a front top perspective view of a doorbell showing our new design;

FIG. 2 is a rear bottom perspective view of the doorbell shown in FIG. 1;

FIG. 3 is a front elevational view of the doorbell shown in FIG. 1.

FIG. 4 is a rear elevational view of the doorbell shown in FIG. 1;

FIG. 5 is a left-side elevational view of the doorbell shown in FIG. 1;

FIG. 6 is a right-side elevational view of the doorbell shown in FIG. 1;

FIG. 7 is a top plan view of the doorbell shown in FIG. 1; and,

FIG. 8 is bottom plan view of the doorbell shown in FIG. 1.

In the drawings the long-short broken lines represent the boundaries of the claimed design, while the short-short broken lines depict environmental subject matter which forms no part of the claim. The broken lines form no part of the claimed design. 

CLAIM The ornamental design for a doorbell, as shown and described. 